Fastener.



r. s. CARR.

F-ASTENER.

APPLICATION. FILED` A111112. 23. 1917.

Patented Apr. 15,1919..

v Imwmwm W@ @www rra erratas Para rnc FRED s. CARR, E NEWTON, MASSACHUSETTS, ASSIGNOR To CARR EASTENER COMPANY, oF CAMBRIDGE, MASSACHUSETTS, A CCRPCRATICN or MAINE.

EASTENER.

Application mea August 23, 1917. serial No. 187,866.

' To all whom it mzg/ concern:

e it known that I, FRED S. CARR, a citizen of the United States, and a resident of Newton, county of Middlesex, Commonwealth of Massachusetts, (whose ost-office address is care of Carr Fastener ompany, Cambridge, Massachusetts,) have invented an Improvement in Fasteners, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings repre. senting like parts.

This invention pertains tof improvements 4in fasteners, and more particularly, though not exclusively to improvements in snap fasteners in which separation of two engaging elements can be effected by tipping movement of one of said elements in one direction only.

Referring to the drawings:

Figure 1 1s a front elevation of aV fastener constituting a preferred formof my invention;

Fig. 2 is a section on a line 2 2 of Fig. 1;

Fig. 3 isa rear View showing details of the socket and the preferred form of jaw mechanism therefor;

Fig. 4 is a' rear view of the front of the socket prior to its attachment to the fabric, and shows a preferred form of attachment for the front plate of-the socket to the intermediate plate of the socket. e

Referring to the drawings, I have shown a stud 5 having a head 6 providing shoulders 7 and 8, preferably symmetrical as shown, and adapted to be engaged by a spring jaw 9 extending transversely of the socket above the stud.

The socket preferably comprises the front plate 10 and the back plate 11 adapted to hold the spring forming the j aw 9 between them, and preferably providing an aperture in the front plate for the reception of the head 6 of the stud 5. The socket may bev attached to fabric 12 by a plate 13 and prongs 14, which are preferably integral i with the front plate 10.

The stud 5 may be attached to fabric or other material in any suitable way.

The shoulder 7 of the stud is preferably abrupt so that separation of the stud and socket by rectilinear tension is impossible.

The intermediate plate 11 or the back plate 13 or both of said plates are, as shown, preferably slightly elongated so that thel bottom of the socket may be moved outwardly and upwardly, thereby permitting the shoulder 7 to slide out from under the spring jaw 9.

Tipping of the `socket relative to the stud 5 in any direction other than that above described 1S prevented by engagement of the Stud 5 with the sides of the aperture through which it passes at the back ofthe socket.

'Iihe stud may be entered in the socket by rectilinear movement, the rounded head 6 of the stud 5 crowding the jaw 9 upwardly.-

When the spring 9 enters the groove inthe stud 5 the pressure of the jaw tends to keep the bottom of the stud in close engagement with the bottomof the aperture through the socket. 1

In the manufacture of fasteners it is the usual' practice to assemble the front plate, back plate and spring of the socket in the factory, and to leave the assembly of the back plate with the rest of the socket until the socket is to be applied to the fabric. 1 I have shown improved means for securing the intermediate plate 11 to the front plate 10 by imparting a Slight twist to the prongs 14. This provides a very strong and inexpensive means of attachment, which in no way interferes with the use of the prongs llt'for attachment of the back plate 13. I preferably twist the prongs 14 in the direction shown that changes involving omission, alteration,

substitution and reversal of4 parts, and even `changes in themode offoperation, may be made without departing from the scope of my invention, which is best defined in the following claims.

Claims:

1. A separable fastener including a casing comprising a front plate having prongs projecting rearwardly therefrom, a second plate secured t0 Said front plate by offsets in said prongs, and a third plate on the opposite side of the carrying fabric from said second plate and held in position by bentl over ortions of said prongs rearwardly of the rst- 5 named offsets therein.

2. A separable fastener having a casing comprising a front plate having prongs projecting rearwardly therefrom, and a second plate secured to said front plate .by twisted portions-of said prongs. 10

In testimony whereof, I have signed my name to this specification.

` FRED S. CARR. 

